# 在位于屏幕中央且宽度合适的方框内打印一个句子
sentence = input("Sentence: ")

screen_width = 80

text_width = len(sentence)
box_width = text_width + 6
left_margin = (screen_width - box_width) // 2

print()
print(' ' * left_margin + '+' + '-' * (box_width - 4) + '+')
print(' ' * left_margin + '| ' + ' ' * text_width + ' |')
print(' ' * left_margin + '| ' +        sentence   + ' |')
print(' ' * left_margin + '| ' + ' ' * text_width + ' |')
print(' ' * left_margin + '+' + '-' * (box_width - 4) + '+')
print()